The up arrow was a signal to stop.

向上的箭头是停止的信号。

Compared to non-gamers, they more often could stop themselves from clicking a key when the up arrow appeared.

与非游戏玩家相比，当向上箭头出现时，他们更经常能够阻止自己点击按键。

The first, obvious way is just using the up arrow, and slowly going through all your history, looking for these matches.

第一种显而易见的方法就是使用向上箭头，慢慢浏览所有历史记录，寻找这些匹配项。